28 citations · 96 across the 9 of their papers we have counts for
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A Possible Chemical Clock in High-mass Star-forming Regions: N(HC3N)/N(N2H+)?
Y. X. Wang, J. S. Zhang, H. Z. Yu +5
We conducted observations of multiple HC3N (J = 10-9, 12-11, and 16-15) lines and the N2H+ (J = 1-0) line toward a large sample of 61 ultracompact (UC) H II regions, through the In…
Molecules in the peculiar age-defying source IRAS 19312+1950
Jian-Jie Qiu, Yong Zhang, Jun-ichi Nakashima +5
Context. IRAS 19312+1950 is an isolated infrared source that exhibits a characteristic quasi-point-symmetric morphology in the near- and mid-infrared images and is also very bright…
Non-detection of Broad Hydrogen Radio Recombination Lines in Circinus Galaxy
Junzhi Wang, Yong Shi, Zhi-Yu Zhang +5
The line widths of broad line regions (BLRs) of AGNs are key parameters for understanding the central super massive black holes (SMBHs). However, due to obscuration from dusty toru…
Molecular Oxygen in the nearest QSO Mrk 231
Junzhi Wang, Di Li, Paul F. Goldsmith +7
We report the detection of an emission feature at the 12 sigma level with FWHM line width of about 450 km/s toward the nearest quasi-stellar object, QSO Mrk 231. Based on observati…
λ = 2 mm spectroscopy observations toward the circumnuclear disk of NGC 1068
Jianjie Qiu, Jiangshui Zhang, Yong Zhang +2
Aims. We investigate the physical and chemical conditions of molecular gas in the circumnuclear disk (CND) region of NGC 1068. Methods. We carried out a spectral line survey with t…
Millimeter Spectral Line Mapping Observations Toward Four Massive Star Forming HII Regions
Shanghuo Li, Junzhi Wang, Zhi-Yu Zhang +6
We present spectral line mapping observations toward four massive star-forming regions (Cepheus A, DR21S, S76E and G34.26+0.15), with the IRAM 30 meter telescope at 2 mm and 3 mm b…